Driving around any city in the game especially with the new vehicle changes makes it nearly impossible to traverse during the daytime, and thats okay but there is literally no way to lower the zombie amount in the game anymore, so instant swarming happens everytime i try to explore a city.
Cities are supposed to be very dangerous. You’re not really supposed to just blast through 'em with a vehicle or dive in on foot casually.
You can try and slip in at night and make your way to a specific location if you’re in need of a quick targeted loot. If you’ve got grander ambitions and needs, you’ll want to post up outside the town, and accept that a one man siege of a city is not going to be easy.